"Which could be useful for AI assistants as they'll know whether you're barking orders at them or the kids or the TV"
What's the point, not one of the above will pay attention anyway!
To improve how people talk to machines in environments with multiple network-connected devices, boffins at Carnegie Mellon University in the US have devised an acoustic measurement technique for determining the direction a person is facing while speaking. In an email to The Register, Karan Ahuja, a doctoral student at CMU, …
> "Hey, Alexa" or "Hey, Google" was designed to tell the device who was talking to what
True, but they're preparing the day when every device and appliance in your house has Alexa/Google built in, and a carelessly tossed "Hey Big Brother" would cause your whole household to reply.
(I don't have one of those things either, but I guess that soon one will have to jump through hoops to avoid constantly sharing his life with the Big Brothers. "1984" was a business plan, not a fiction.)
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